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:: Volume 6, Issue 3 (3-2019) ::
JAIR 2019, 6(3): 115-128 Back to browse issues page
Effect of stocking density and feeding rate on growth, hematological parameters and water quality in rearing of juvenile Bluga (Huso huso)
Zeid Ahmadi * , Reza Akrami , Mehdi Kharkan Ghamsari
Abstract:   (3641 Views)
Growth, hematological parameters and water quality for great sturgeon (Huso huso), were determined at three different stocking densities and three feeding rates. Stocking density were 1, 1.5 and 2 kg m-2 and feeding rates were 1, 2, and 3% body weight day-1. Sturgeon were offered to 18 tanks and 3×3 experimental design was used with two replicates per treatment. Initial average body weights of the fish were 25 ± 1.5g and were hand-fed a pelleted commercial feed (44 % protein, 20% fat, and 7% ash) twice daily throughout the experiment period. After about 7 weeks of feeding, optimal feeding rate and growth performance was observed in 1 kg m-2 and 3% of body weight day-1 and there were significant difference interaction in stocking density and feeding rate between treatments (P<0.05). The results demonstrated that hematological parameters were not significantly different in all groups (P>0.05). No mortality was abserved during the experiment. Water quality including ammonia (NH3) and dissolved oxygen (DO) showed significant differences (P<0.05) among the treatments affected by different densites and feeding rates, while temperature and pH showed no significant difference (P>0.05). Results show that the optimum feeding rate and stocking density for fishes weighing 25 to 155 would appear at a feeding rate at 3% body weight day-1 with the stocking density 1 kg m-2.
Keywords: stocking density, feeding rate, growth, hematological parameters, water quality, Bluga (Huso huso)
Full-Text [PDF 251 kb]   (1034 Downloads)    
Type of Study: Research | Subject: Special
Received: 2015/07/16 | Accepted: 2018/03/6 | Published: 2019/03/10
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Ahmadi Z, Akrami R, Kharkan Ghamsari M. Effect of stocking density and feeding rate on growth, hematological parameters and water quality in rearing of juvenile Bluga (Huso huso). JAIR 2019; 6 (3) :115-128
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Volume 6, Issue 3 (3-2019) Back to browse issues page
نشریه علمی پژوهشی پژوهشهای ماهی شناسی کاربردی Journal of Applied Ichthyological Research
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